Valve for air-compressors.



E. A. WATTS.

VALVE FOR AIR COMPRESSORS.

APPLICATION mio JULY 8,1914.

:MAI-96m Patented Apr. 13, 1915.

2 SHEETS-SHEET 1.

E. A. WATTS.

VALVE FOR AIR COMPRESSORS.

APPLICATION FILED IULY 8| I9I4. TITAI Patented Apr. I3, 1915.

2 SHEETS-SHEET 2.

nventoz fp@ M s@ dll " yFFI@m A. WhWIITS, 0F SPBINGFILD, OHIO, ASSIGNOB, T0 THE MILLER IFIPBOVIED GAS ENGHIE COMPANY, 0F SFWGFJUELJD, 0HIO,' A CORIOM'IION 0F OHIO.

VALVE FOR AIR-COMPRESSORS.

Specication of Letters Patent.

Fatented dpr. t3, lml.

hpplication led July t, 19M. Serial Ito. 849,704.

Twill 'whom' it may concern Y Fe it mown that I. France it. WATTS, a citizen ot the United States. residing at Springlield, in the county of Clark and State ot Uhio, have invented certain new and usetul Improvements in `Valves for Airtlompressors, ot which the following is a specitication.

'lhis improvement relates to an improved air compressor particularly adapted for high pressure work.

. `lhe :object is to construct a simple and ecient device such that there shall be a most ellicient motion of the piston and an improved suction ot the air. caused by an improved construction and location of the valve. AkIt is especially adapted for high piston speed and high pressure work.

In the accompanying drawings: Figure l is a longitudinal section view,- showing the piston moving toward the left vhand end of the cylinder. Fig. 2 is a detail view of the valve. Fig. portion ot the closed. Fig. 4l is a similar view showing the valve open. Fig. 5 is an enlarged detail sectional view ot a portion of the valve and inlet. J

Like letters ot reference indicate like parts in the several views. f

rlFhe main teature of this improved. construction is that the valve is ot a simple ringconstruction and so arranged that there will bean 'increased port area, while there is maintained the proper clearance between the piston and the heads ot `:the .cylinder thereby diminishing any opportunity for air to torna in pockets, so as to interfere with the proper action ot the piston on its compression stroke. 'lhe valve is so.. arranged that the air can enter both around the notched outer periphery ot the valve and also the inner open portion ot the valve and by reason ot the valve being properly located with reference to the bore of the cylinder the circumference of the valve is much larger than the inner bore ot the cylinder, which also increases the port area, and by reason of the tact that the valve is of a tlat ring type and is placed at the extreme end ot the cylinder there is little or no chance ot air forming in any pockets. to interfere with the proper compression of the air.

Referring to Fig. l, l represents the cylinder and 2 the heads thereof; the cylinder 3 isa longitudinal section o f a devices showing the valve valve.

and heads being water jacketed in the usual way for cooling purposes. The piston for the cylinder is marked 3 and is connected in the usual and ordinary way to the piston rod t. Fach end of the cylinder is formed with a counterbore or recess la and in each recess is'located an open valve ring As shown best in Fig. 2 this valve is notched so as to form a series of ports 5 on its outer periphery. Secured to this valve are plungers 6. there being preferably shown six of these plungers. 'Ihe plungers lit into guides formed in the casing of the cylinder T and the springs 8 tend to force the valve into its closed position and the plungers 6 and guides 8a are so proportioned that when the suction of the air tends to open the valve the plunger will contact against the end ott the guide S and insure the valve being held in a position such that the air can enter around vthe parts formed on the outer periphery ot the valve as well as the opening around the inner periphery of the ts shown in Fig. 1, at the right hand end of the cylinder, and also in Fig. l, on the suction stroke of the piston the valve is moved to a position such that the plungers 6 Contact against the inner wall of the guide of the chamber or casing and the valve is thereby held in open position intermediate the head ot the cylinder and the inner wall of the cylinder recess 1a so that the air from the ports 9 formed in the head 2 will pass through the peripheral ports 5 ot the valve ring and also will enter the cylinder through the central opening formed in the valve ring thereby greatly increasing the port area. It is apparent that there is a very slight movement of the valve. and yet a very large port area for the intake of the air, and b v the location of the valve as shown in Figs. l, 3 and 4 such that the cir- A clmference of the valve is greater than the inner bore of the cylinder with the guides tor the plungers located in the cylinder and by reason of the location of the valve at the extreme ends of the cylinders without any pockets, being of a Hat, thin character, there is thereby insured the proper clearance for the piston with `little or no possibility of air being held in any part ot the valvev to interfere with the 'compression stroke ofthe piston. w l Y A 1,

rllhe intakes for the air are indicated by l1 in Fig. l which intakes communicate llt) with the chambers 12 formed in the cylinder heads and enters the bore of the cylinder at the ports 9 heretofore referred to.

Having thus described my invention, I claim:

1. In an air pump or compressor, the combination of a piston and cylinder, a valve of greater circumference than the bore of the cylinder and located at the eXtreme end of the cylinder With port openings for the air at both the outer and C)inner periphery of the valve, substantially as specified.

2. In an air pump or compressor, the combination of a piston and cylinder, an annular valve of greater circumference than the inner bore of the cylinder having inlets for the air arranged around the outer periphery and also Within the inner periphery of the valve, and means for holding the valve in position whereby the air enters around both the outer and inner periphery thereof.

3. Inan air pump or compressor, the combination of a piston and cylinder, an annular valve of a flat ring type located at the eXtreme end of the cylinder, and means for holding the valve in open position such that the air can enter around the outer periphery as Well as Within the inner peripher v In -an air A pump or compressor, the combination of a cylinder and piston, an annular flat valve ring of greater circumference than the bore of the cylinder, plungers for the valve and guides formed in the cylinder for such plungers, and ports about the outer periphery of the valve, the plungers and guides being so arranged that the valve will be held in position such that the air` Will enter through the peripheral ports and also through the inner periphery of the valve.

5. The combination of a cylinder and piston, heads inclosing the ends of the cylinder, each end of the cylinder adjacent the head being counter-bored to form a recess, a valve ring located in each of said recesses, together with springs for holding said Valve in closed position against its corresponding head, each of said valve rings being formed with peripheral ports and also with an open center, means for limiting the movement of said ring in opening so as to cause said ring to stand intermediate the ends of said recess when in open position, and ports in said head.

In testimony whereof, I have hereunto set my hand this 2nd day of July, 1914.

ELMER A. WATTS. 

